Rule
Dark Skies
Interlaken - Dark Skies - Alps
Interlaken, Bern, Switzerland
Moonless nights with crystal-clear skies for deep-sky photography
Upcoming Opportunities
When all conditions match, PhotoWeather marks an opportunity window.
Times shown in Europe/Zurich
Next opportunity
Pristine Dark Skies (pristine)
Interlaken
Sun, Feb 22 · 04:00–05:00 · 1h window
Medium confidence
46%
🌛Moon Altitude-27.1°
☁️Total Cloud Coverage5%
Good Dark Skies
Interlaken
Sun, Feb 22 · 05:00–05:40
🌛Moon Altitude:-26.2°
Medium
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72-hour requirements breakdown
What passed or failed, hour by hour0matching hours in the next 95 hours
OR logic: one branch per group is enough
Meets requirement
Misses requirement
Time Europe/Zurich | Astronomical Night Any | Total Cloud Coverage ≤ 20.0% | Visibility ≥ 12000.0m | Precipitation Chance ≤ 10.0% | Moon Illumination OR1·B1≤ 35.0% | Moon Altitude OR1·B2≤ 10.0° |
|---|---|---|---|---|---|---|
| Mon, Feb 16 | ||||||
| 14:00 | ✕ | 100% | 31m | 100% | 1.2% | 20° |
| 15:00 | ✕ | 100% | 73m | 100% | 1.2% | 14° |
| 16:00 | ✕ | 100% | 208m | 100% | 1.2% | 6.8° |
| 17:00 | ✕ | 100% | 1259m | 100% | 1.2% | -1.7° |
| 18:00 | ✕ | 100% | 80m | 100% | 1.2% | -11° |
| 19:00 | ✓ | 100% | 815m | 100% | 1.2% | -21° |
| 20:00 | ✓ | 100% | 594m | 100% | 1.2% | -31° |
| 21:00 | ✓ | 100% | 108m | 100% | 1.2% | -40° |
| 22:00 | ✓ | 100% | 93m | 100% | 1.2% | -49° |
| 23:00 | ✓ | 100% | 78m | 100% | 1.2% | -55° |
| Tue, Feb 17 | ||||||
| 24:00 | ✓ | 100% | 61m | 100% | 1.2% | -59° |
| 01:00 | ✓ | 100% | 45m | 100% | 0% | -58° |
| 02:00 | ✓ | 100% | 54m | 100% | 0% | -53° |
| 03:00 | ✓ | 100% | 61m | 100% | 0% | -45° |
| 04:00 | ✓ | 100% | 231m | 100% | 0% | -36° |
| 05:00 | ✓ | 100% | 164m | 100% | 0% | -26° |
| 06:00 | ✕ | 100% | 91m | 100% | 0% | -16° |
| 07:00 | ✕ | 100% | 217m | 100% | 0% | -5.6° |
| 08:00 | ✕ | 100% | 102m | 100% | 0% | 3.9° |
| 09:00 | ✕ | 100% | 123m | 100% | 0% | 13° |
| 10:00 | ✕ | 100% | 77m | 100% | 0% | 20° |
| 11:00 | ✕ | 100% | 243m | 100% | 0% | 26° |
| 12:00 | ✕ | 100% | 193m | 100% | 0% | 30° |
| 13:00 | ✕ | 100% | 43m | 100% | 0% | 30° |
| 14:00 | ✕ | 86% | 85m | 86% | 0% | 28° |
| 15:00 | ✕ | 43% | 21698m | 71% | 0% | 24° |
| 16:00 | ✕ | 100% | 299m | 57% | 0% | 17° |
| 17:00 | ✕ | 99% | 55m | 59% | 0% | 9.5° |
| 18:00 | ✕ | 80% | 193m | 61% | 0% | 0.49° |
| 19:00 | ✓ | 87% | 3867m | 64% | 0% | -9.1° |
| 20:00 | ✓ | 100% | 10612m | 43% | 0% | -19° |
| 21:00 | ✓ | 100% | 4275m | 21% | 0% | -28° |
| 22:00 | ✓ | 68% | 10626m | 0% | 0% | -38° |
| 23:00 | ✓ | 71% | 10794m | 8.7% | 0% | -45° |
| Wed, Feb 18 | ||||||
| 24:00 | ✓ | 74% | 24070m | 17% | 0% | -51° |
| 01:00 | ✓ | 68% | 24135m | 26% | 1.2% | -53° |
| 02:00 | ✓ | 98% | 24134m | 38% | 1.2% | -51° |
| 03:00 | ✓ | 100% | 24135m | 50% | 1.2% | -46° |
| 04:00 | ✓ | 100% | 24135m | 61% | 1.2% | -38° |
| 05:00 | ✓ | 100% | 24134m | 65% | 1.2% | -29° |
| 06:00 | ✕ | 100% | 24135m | 69% | 1.2% | -19° |
| 07:00 | ✕ | 100% | 6469m | 73% | 1.2% | -9° |
| 08:00 | ✕ | 100% | 10999m | 61% | 1.2% | 1.1° |
| 09:00 | ✕ | 100% | 12505m | 50% | 1.2% | 11° |
| 10:00 | ✕ | 100% | 23398m | 39% | 1.2% | 20° |
| 11:00 | ✕ | 98% | 3107m | 34% | 1.2% | 27° |
| 12:00 | ✕ | 89% | 816m | 30% | 1.2% | 33° |
| 13:00 | ✕ | 100% | 1010m | 26% | 1.2% | 36° |
| 14:00 | ✕ | 100% | 278m | 17% | 1.2% | 36° |
| 15:00 | ✕ | 100% | 109m | 8.7% | 1.2% | 34° |
| 16:00 | ✕ | 100% | 72m | 0% | 1.2% | 28° |
| 17:00 | ✕ | 100% | 68m | 7.4% | 1.2% | 21° |
| 18:00 | ✕ | 100% | 1510m | 15% | 1.2% | 12° |
| 19:00 | ✓ | 100% | 10652m | 22% | 1.2% | 2.9° |
| 20:00 | ✓ | 100% | 24134m | 35% | 1.2% | -6.8° |
| 21:00 | ✓ | 100% | 24134m | 47% | 1.2% | -17° |
| 22:00 | ✓ | 100% | 24135m | 60% | 1.2% | -26° |
| 23:00 | ✓ | 100% | 24134m | 72% | 1.2% | -34° |
| Thu, Feb 19 | ||||||
| 24:00 | ✓ | 100% | 24135m | 84% | 1.2% | -41° |
| 01:00 | ✓ | 100% | 24134m | 96% | 4.5% | -46° |
| 02:00 | ✓ | 100% | 24134m | 89% | 4.5% | -47° |
| 03:00 | ✓ | 100% | 24134m | 83% | 4.5% | -44° |
| 04:00 | ✓ | 98% | 24134m | 76% | 4.5% | -38° |
| 05:00 | ✓ | 100% | 24135m | 82% | 4.5% | -31° |
| 06:00 | ✕ | 100% | 19969m | 87% | 4.5% | -22° |
| 07:00 | ✕ | 100% | 2964m | 93% | 4.5% | -12° |
| 08:00 | ✕ | 100% | 8486m | 89% | 4.5% | -1.8° |
| 09:00 | ✕ | 100% | 12433m | 85% | 4.5% | 8.3° |
| 10:00 | ✕ | 100% | 11930m | 82% | 4.5% | 18° |
| 11:00 | ✕ | 100% | 11681m | 87% | 4.5% | 27° |
| 12:00 | ✕ | 100% | 2690m | 92% | 4.5% | 35° |
| 13:00 | ✕ | 100% | 1729m | 98% | 4.5% | 40° |
| 14:00 | ✕ | 100% | 106m | 95% | 4.5% | 43° |
| 15:00 | ✕ | 100% | 40m | 91% | 4.5% | 43° |
| 16:00 | ✕ | 100% | 33m | 88% | 4.5% | 39° |
| 17:00 | ✕ | 100% | 41m | 91% | 4.5% | 32° |
| 18:00 | ✕ | 100% | 39m | 95% | 4.5% | 24° |
| 19:00 | ✓ | 100% | 56m | 98% | 4.5% | 15° |
| 20:00 | ✓ | 89% | 142m | 97% | 4.5% | 5.5° |
| 21:00 | ✓ | 79% | 229m | 96% | 4.5% | -4.3° |
| 22:00 | ✓ | 68% | 315m | 95% | 4.5% | -14° |
| 23:00 | ✓ | 68% | 819m | 96% | 4.5% | -23° |
| Fri, Feb 20 | ||||||
| 24:00 | ✓ | 68% | 1324m | 97% | 4.5% | -30° |
| 01:00 | ✓ | 68% | 1829m | 98% | 10% | -36° |
| 02:00 | ✓ | 76% | 1370m | 89% | 10% | -39° |
| 03:00 | ✓ | 85% | 912m | 80% | 10% | -40° |
| 04:00 | ✓ | 94% | 454m | 72% | 10% | -37° |
| 05:00 | ✓ | 95% | 1309m | 71% | 10% | -31° |
| 06:00 | ✕ | 96% | 2165m | 71% | 10% | -23° |
| 07:00 | ✕ | 97% | 3021m | 71% | 10% | -14° |
| 08:00 | ✕ | 98% | 3284m | 67% | 10% | -4.6° |
| 09:00 | ✕ | 99% | 3547m | 64% | 10% | 5.5° |
| 10:00 | ✕ | 100% | 3809m | 60% | 10% | 16° |
| 11:00 | ✕ | 99% | 2711m | 62% | 10% | 25° |
| 12:00 | ✕ | 98% | 1613m | 64% | 10% | 35° |
How to read: colored cells show whether each predicate requirement is met; highlighted rows mean the full rule matched (an opportunity). For OR groups, only one branch is required, so some OR-branch predicates can be ✕ even in a matching hour.
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